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Possible Room-Tempe...
Possible Room-Temperature Ferromagnetism in Self-Assembled Ensembles of Paramagnetic and Diamagnetic Molecular Semiconductors
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- Dhara, Barun (författare)
- IISER, Dept Chem, Pune 411008, Maharashtra, India.
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- Tarafder, Kartick (författare)
- NITK, Dept Phys, Mangalore 575025, India.
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- Jha, Plawan K. (författare)
- IISER, Dept Chem, Pune 411008, Maharashtra, India.
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- Panja, Soumendra N. (författare)
- IISER, Dept Phys, Pune 411008, Maharashtra, India.
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- Nair, Sunil (författare)
- IISER, Dept Phys, Pune 411008, Maharashtra, India.
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- Oppeneer, Peter M. (författare)
- Uppsala universitet,Materialteori
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- Ballav, Nirmalya (författare)
- IISER, Dept Chem, Pune 411008, Maharashtra, India.
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IISER, Dept Chem, Pune 411008, Maharashtra, India NITK, Dept Phys, Mangalore 575025, India. (creator_code:org_t)
- 2016-11-23
- 2016
- Engelska.
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Ingår i: The Journal of Physical Chemistry Letters. - : American Chemical Society (ACS). - 1948-7185. ; 7:24, s. 4988-4995
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Owing to long spin-relaxation time and chemically customizable physical properties, molecule-based semiconductor materials like metal-phthalocyanines offer promising alternatives to conventional dilute magnetic semiconductors/oxides (DMSs/ DMOs) to achieve room-temperature (RT) ferromagnetism. However, air-stable molecule based materials exhibiting both semiconductivity and magnetic-order at RT have so far remained elusive. We present here the concept of supramolecular arrangement to accomplish possibly RT ferromagnetism. Specifically, we observe a clear hysteresis-loop (H-c approximate to 120 Oe) at 300 K in the magnetization versus field (M H) plot of the self-assembled ensembles of diamagnetic Zn-phthalocyanine having peripheral F atoms (ZnFPc; S = 0) and paramagnetic Fe-phthalocyanine having peripehral H atoms (FePc; S = 1). Tauc plot of the self-assembled FePc center dot center dot center dot ZnFPc ensembles showed an optical band gap of similar to 1.05 eV and temperature-dependent current-voltage (I-V) studies suggest semiconducting characteristics in the material. Using DFT+U quantum-chemical calculations, we reveal the origin of such unusual ferromagnetic exchange-interaction in the supramolecular FePc center dot center dot center dot ZnFPc system.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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